EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS - Funded Status of Defined Benefit Plans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Pension Plan
EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS
Benefit obligation at beginning of year	$ 1,128	$ 1,101
Service cost	0	0	$ 0
Interest cost	22	20	23
Plan participants' contributions	0	0
Actuarial (gain) loss	(199)	12
Benefits paid	(5)	(5)
Benefit obligation at end of year	946	1,128	1,101
Fair value of plan assets at beginning of year	1,175	1,062
Actual return on plan assets	(169)	118
Employer contribution	0	0
Plan participants' contributions	0	0
Benefits paid	(5)	(5)
Fair value of plan assets at end of year	1,001	1,175	1,062
Funded status at end of year	55	47
Other Postretirement Benefits Plan
EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS
Benefit obligation at beginning of year	1,297	1,347
Service cost	63	63	46
Interest cost	34	33	39
Plan participants' contributions	137	148
Actuarial (gain) loss	(394)	(65)
Benefits paid	(202)	(229)
Benefit obligation at end of year	935	1,297	1,347
Fair value of plan assets at beginning of year	0	0
Actual return on plan assets	0	0
Employer contribution	65	81
Plan participants' contributions	137	148
Benefits paid	(202)	(229)
Fair value of plan assets at end of year	0	0	$ 0
Funded status at end of year	$ (935)	$ (1,297)